Trimming machine



July 10, 1945. c, L. KNOTT TRIMMINGMACHINE Filed July 29, 1943 2 Sheets-Sheet 1 J ly 1945. cjLfKNoT'r I 2,379,968

- TRIMMING MACHINE Filed July 29, 1943 2 Sheets-Sheet 2 Patented July 10, 1945 TRIMJWING MACHIENE Clyde L. Knott, Beverly, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application July 29, 1943, Serial No. 496,544

9 Claims. (01. 12 -835) This invention relates to trimming machines and isherein illustrated and described as embodied in a machine suitable for trimming the excess mate-' rial from the overlasted marginal portion of the upper in the manufacture of a cement lasted shoe. It is necessary in such trimming operations to break the cement bond which binds the upper to the insole and to raise theportion to be trimmed from the insole. It is also desirable, in order to assure uniform trimming, to raise the marginal portion of the upper at a fixed distance inwardly from the perimeter of the shoe bottom.

It is an object of the present invention to provide a trimming machine capable of operating in the manner outlined above. with a feature of the invention the illustrated In accordance machine is provided with a gage engageable with 1 l the overlasted margin of the upper and having a shoulder about which the upper material may be bent away from the shoe bottom by alifting tool, a gage engageable withthe perimeter of the shoe bottom, and trimming means adjacent to the first mentioned gage. The lifting tool, shown herein, has a wedge-shaped nose which enters between the insole and the margin of the upper and which is moved in an orbital path which is relatively flat in the vicinity of the shoe bottom to enable the tool to advance in contact with the insole and which then curves to cause the tool to raise the loosened margin and to be retracted out of contact, with theshoe bottom. The flatness of the orbital path in the vicinity of the shoe bottom is important in enabling the tool to pick up the margin of the upper material regardless of variations of distance of the edge of the upper material inwardly fromthe perimeter of the shoe bottom. The trimming means consists of a knife mounted for movement about a fixed axis, the

Referring to the drawings,

Fig. 1 is afront elevation of the upper portion of an illustrative machine;

Fig. 2 is an enlarged view of the front elevation showing the operating instrumentalities of the machine in relation to a shoe;

Fig. 3 is a view in perspective of the forward portion of the shoe illustrating the character of the operation performed by the machine.

Fig. 4 is a plan view, partly in section, of the 7 operating instrumentalities; t

Fig. 5 is a view in front elevation, partly in section, on a scale still larger than that of Fig. 2; and 1 l Fig. 6 is a side elevation, partly on a section taken on the lineVI-VI shown in Fig. 5. a l

In the description which is to follow the term shoe is used to denote the assembly of a lasted of Fig. 2, of the parts upper and insole; and th term shoe bottom to denote the exposed surfaces of the insole and of the over-lasted margin of the upper.

The operating instrumentalities ofthe illustrated machine comprise a tool III in the form of a finger having a wedge-shaped nose 38 (Fig. 5) for raising a portion of the overlasted margin of the upper U of a lasted shoe S, an arcuate knife [2 for trimming the raised portion of the upper, and a bracket l4 which carries facilities for gaging the shoe relatively to the tool Ill and the knif l2., These various members are all supportedby a frame lfi (Fig. 1) adapted. to rest upon the floor. and having a laterally extending upper portion [8 which is integral with the reblade of the knife being curved about th same cillated about its axis ofrotation, and it is arcuate rather than circular. The oscillation of the knife iseffected by a link from. the same mechanism which operates the lifting tool, and insuch a manner that while the tool is advancing the knife moves in a direction opposite to that of the tool 1 and while the tool is being retractedthe knife moves in a direction tending frictionally to raise the margin of the upper material.

fWith the above and other objects and features inview the invention will now be described in connection with the accompanying drawingsand will bepointed out in. the. claims.

a locality adjacent to its opposite end is pivotally connected by a pin 25 to a supportin link 26 'Which extends downwardly. The lower end of the link 26. is pivotally mounted for free swinging movement upon a pin 28 secured in the frame member 3. The end portion of the rod 24 be- T yond the link 26 carries a block 30 which is adjustable in a direction parallel tothe axis of the shaft 20. Provision for such adjustment is obtained by means of a guideway 32 formed in the rod 24 and along which the block 30 is slidable. The block 30 may be clamped in any desired position of adjustment along the guideway 32 by a bolt 34 threaded into the rod 24. ,and extending through a slot in the block 36. The block 30 has formed in it a guideway for the tool ill. The block is split along the guideway to enable th tool Ill to be secured by a clamping bolt 36 with the point or nose 38 of the tool l (Fig. in any desired position or adjustment along a line which lies in a plane normal or radial to the axis of the shaft 2|]. It will be noted that by reason of the fact that the supporting link 26 extends down wardly from the rod 24 to a fixed supporting pivot pin'28 the path of the nose 38 of the tool l6 will be ellipsoidal in form as indicated by the closed curve (broken line, Fig. 5) 40 and that the: lo'wer portion of this path is relatively flat as compared a direction away from the shaft 20) and also rearwardly therefrom in a direction parallel .to the shaft 26 is a flange or foot 45. The major portion of the under surface of the foot 45 (indicated-in Fig. l by the numeral 46-) is plane and parallel to the axis of'the shaft 26, being a little above the level of the axis of the shaft 26, and sloping downwardly at a slight angle to the horizontal in a direction away from said axis. This under surface 46 serves as a height gage against which the shoe is held inverted with the overlasted margin U in contact therewith. Mounted for free rotation upon a pin 48 secured in the foot 45 isa roll 5|] adapted to bear against the perimeter of the shoe bottom, which roll constitutes a stop or an abutment to determine the lateralposition of the shoe. 48 extends through a slot 49 (Fig. 4) in the foot 45, and may be secured insaid slot in any de sired position of adjustment toward or away from the shaft 2|] by a nut 5|. The gaging sur face 46 terminates abruptly an obtuse angle at the elbow of the shank 4| to form a straight edge or shoulder 56 (Figs. 1 and 4). From the shoulder 56 the inner surface of the shank 4| slopes upwardly and inwardly at a slight angle from the vertical. The shoulder 56 continues rearwardly beyond the shank 4|, constituting the lower and inner (or righthand) edge of the foot 45, and the edge surface of the foot is continuous with the inner surface of the shank 4|, sloping upwardly and inwardly at the same slight angle from the vertical to an edge 51 only slightly above the shoulder 56. Above the edge 51 the edge surface of the foot is beveled upwardly and outwardly, as indicated by the referencecharacter 59 on Figs. 4 and 5. The foot 45 extends rearwardly nearly to the cutting edge of the knife l2, and it has a lug 6| which extends rearwardly over the cutting edge of the knife, the under surface of the lug being beveled upwardly,(to the line 63 on Fig. 5) from the gaging surface 46 in the form of a frustum of a cone co-axial with the knife in the extreme right-hand position of adjustment of the knife to enable the lug 6| to clear the knife. The continuation of the shoulder 56 along the lug 6| and over the knife. serves as a shearing edge for holding the work against theknife l2. This: shearing edge, which slopes upwardly and ream:

The pin.

k for the tool and the knife.

wardly relatively to the shoulder 56, is indicated on Fig. 4 by the reference numeral 61.

Rotatably mounted for oscillation upon a pin 58 secured in the shank 4| is a sector 60 having an arm 62 extending upwardly and inwardly, or toward the right, as shown in Figs. 1 and 2. The upper end of the arm 62 is pivotally connected to one end of a link 64, the opposite end of opening 65 (Fig. 5) through which the severed upper stock may pass.

The sector 60 also has a peripheral flange or rim 66 (Fig. 6) which is frusto-conical in shape. Clamped against the outer surface of the rim 66 by an arcuate clamping plate 68 is the knife I2, which is flexible. A portion of the forward edge of the clamping plate is beveled for clearance, as indicated by the reference. numeral 69 in Figs. 4 and 6. A pair of radial clamping screws 12 threaded into the sector 60 hold the arcuate plate 68 in clamping position. It will be observed that the oscillation of the pin .25 about the pin 28 will be transmitted through thelink 64 to rock thesector'60 aboutthe fulcrum pin 58 and thereby to operatethe knife.

The knife |2,may be adjusted heightwisewith respect to a sole held against the gaging surface 46. Such adjustment is made possible by an arrangement' wherein the pin 56, upon which the knife sector is mounted, extends through a slot- 14 formed in a boss 16 on the shank 4|. The slot 14 is arcuate about an-axis which coincides with an extension of the straight line defining the edge 56 of the gaging surface 46. One end' iof the pin. 58 has a head 18 which bears against one end of a spacing collar BU -interposed between the pin 58 and the hub of the knife sector. The other end of the collar bears against a washer 8| which engages a finished surface on the boss 16. The opposite end of thepin 58 has threaded thereon a nut 82 which holds a washer 84 against the boss 16. The pin 58 may thus be clamped in any desired position of adjustment in the slot 74, and the hub of the knife sector is freely rotatable about'the "collar 80 for any such position ofadjustment. The radius of the knife l2 about the axis of the pin 58, and the'radial distance of the axis of the pin'58 from the edge 56, are made exactly equal to insure the cutting edge of the knife l2 always, regardless of the adjustment of the pin 58 in the slot 14, passing through the line (extended) which defines the edge 56.

As shown in Fig. 6, the tool in is positioned rearwardly of the shank 4| and forwardly of the knife l2. The bracket |-4 thus serves In operating the machine, the attendant holds the shoe S in the position shown in Fig; 2 with the overlasted. portion of the upperUin contact with the gaging surface 46, and with the perimeter of the shoe bottom (indicated byth'e refer-1 ence character P in Figs. 3 and 6) substantially in engagement with the roll 5|).v The rolll50 should first be adjusted along the arm 451 to bring the shoulder 56 to a desired position inwardly from the perimeter of the shoe bottom.

The purpose of the tool -|0 is first to break the cement bond between the. over-lasted margin of the upper U and the insole (identified was reference character I) ,fand. secondtd raise-this marginal portion by bending it upwardly around the shoulder 56. The tool I6 is aecordi'nglyfaldjusted longitudinally in the blockiWtdbfirig the a ua d wedge-shaped nose of thestool relatively close,

allowingforthelthickness of theupper material,

totthe shoulder56 when the toolis in its most advanced position. 1 The nose 38. of the tool, movingxclockwise in an ellipsoidal path 40 (Fig. will enter between the edge of the overlasted margin of the upper and the insole and advance along a relativelyflat curve which is. substantially: tangenttothe surface of the insole, breakingthe cement bond between the upper material and the insole. The bracket should be adjusted heightwise to insure this condition of substantial etangency. As th'e advancing movement of the nose ofthe'tool continues the tool will rise from the insole and bend the freed upper material about the shoulder 56 and away from the insole to form a flap F. The arcuate knife I2 is positioned under the beveled undersurface of the lug H to sever theflap' F. .The pin 58 should be adjusted inthe slot 14 to bring the cutting edge of the knife l2 substantially tangent,

allowing for reasonable clearance, to the insole.

ing saidportion of the overlasted margin of: the upper? and bending it over said shoulder, and means adjacent to the first-mentioned gage for trimming the raisedportion of the overlasted marginof the uppers t i i 2., An upper-trimming machine comprising a workeguiding member, having a, shoulder erranged to be engaged by the overlastedrmargin of the upper material. lying on the insole. of a lasted shoe, an abutment spaced from said shoulder and arrangedto be engaged by the perimeter of the shoe bottom, a wedge-nosed tool arranged to be inserted between the insole and theedge of said margin, power-operatedumeans for moving the noseof said tool in anxellipsoidal path to bend surplus material of said margin over said shoulder, and power-operated cutting This condition is shown in Fig. 5 wherein the 1 arc K represents the cuttingiedgeof the knife.

If theupper material were thicker, the pin 58 would have to be adjustedfurthento the right and theputting edge of the knife would then assume a lower position, forexample, such as that represented by the arc K (inbroken lines). It will be observed that both arcs pass through the line representingthe shoulder 56,,eXtended.

As shown in Big, 5, the knife makes ascarf cut.

It is important that the lower or inner edge of this scarf should "substantially coincide with the line along which thecement bond between the upper material and the insole has been broken. The above-mentioned heightwise adjustment of the knife for different thicknesses of upper stock satisfies this condition, and results in a neater and cleaner scarf than 'could be obtained otherwise. During the advancing of the tool ID the knife will be moved by the link 64 in a counterclockwise direction about the axis of the pin 58, and whatever frictionaldrag the knife may exert upon the upturned margin of the upper will be retracted and is out of contact with the flap F, the

knife [2 will be moving in a clockwise direction and will, therefore, tend by reason of its frictional drag to hold the flap against the shoulder 56. Fig. 3 shows the forepart of a shoe that has been removed from the machine, for purposes of illustration, before completion of the operation. The overlasted margin of the upper U has been trimmed along a line L parallel to the perimeter P of the shoe bottom.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. An upper-trimming machine comprising a gage engageable with the overlasted margin of the upper of a shoe and having a shoulder about which the portion of the overlasted margin adjacent to the edge of the upper may be bent away from the shoe bottom, a gage engageable with the perimeter of the shoe bottom to insure a predetermined distance between saidshoulder and the perimeter of the shoe bottom, a tool for raismeans arranged to sever the surplus materi l 3. An upper-trimming machine comprising a power-driven knife; a guard located in front of the knife to be engaged by the overlasted margin of the upper material 'lying on the insolecf a lasted shoe, an abutment arranged to be engaged by the perimeter of the sole of'the shoe, said I l guard having an edge spaced from said abutment inwardly of the perimeter of the S016,8, finger having a tip engageable with the insole and the surplusoverlasted upper material projecting inwardlyvbeyond the edge of said guard, and powerdriven means for moving said finger toward and from said abutment, said finger having-an in-j clined face arranged to run under said surplus tool having a wedge-shaped nose adaptedrtozbe material and bend it on said edge away from the insole and in a position to be cut by said knife f I 4. An upper-trimming'machinecomprising a inserted between the insole of a lasted shoe and the overlasted margin of upper material lying-Ion the insole, a work-guiding member having ,a 5

bearing surface arranged to be engagedlbysaid margin and along which the shoe may be advanced, an abutment arranged to be engaged by the perimeter of the shoe bottom, anda power-- operated knife having an arcuatecutting edge and movable about the axisof said edge to 6X8? cute a draw out, said tool being constructed and arranged to bend the "surplus marginal material of the upper about said work-guiding member in a position to be out by said knife as the shoe is advanced.

5 An upper-trimming machine comprising a gage engageable with the overlasted margin of the upper of a Shoe and having a Shoulder about which the portion of the overlasted margin adjacent to the edge of the upper may be bent away from the shoebottom, a guide for the perimeter of the bottom of the shoe as the shoe is fed in contact with said gage, a wedge-nosed tool adapted to enter between the edge portionof the overlasted upper and the insole to raise the upper material from the insole, an arm upon one i end of which said tool is mounted, means for moving the other end of said arm in a circular path, a link having one end pivotally connected to said arm, a pivotal mounting for the other end of said link about which the link may swing to constrain the movement of said tool to a closed path in a portion of which the tool advances in operative contact, with the work and in another portion of which thetool is retracted out of con tact with the work, a lever, a fulcrum upon which said lever is pivotally mounted, a knife carried by said lever and arranged to sever the upper material raised by said too], said knife having being'retracted.

a curved blade coaxial with said fulcrum, and a link pivotally connected at one end to said lever and at the other end tothe f rst-mentioned link for rocking said lever to oscillate the knife, the second-mentioned link being arranged to move the knife in a direction tending frictionally to raise the margin of the upper while the tool is a 6i A'device for raising the margins of cementlasted uppers, comprising a gage having an.un-' dersurface' engageable with the bottom of an invertedl cement-lasted shoe to. determine-the Fheightwise position of thetshoe, a: wedge-nosed tool adapted to enter between the edge portion of the overlaste'd upper of the shoe and the in- Sale, an arm upon one end of which'said tool is mounted, means for moving the other end of said arm in a circular path, a, link having one end pivotally connected to said arm between Said tool and said moving means and extending downwardly, and a pivotal support for the other end of the link 'for confining to an arcuate path the movement of that portion of the arm to which the link is pivotally connected, whereby the nose of the tool will be constrained to movement in a closed path which is relatively flat in the vicinity of' the bottom of a shoe held against said gage.

7. In an upper-trimming machine, a tool for raisinga portion of the overlasted margin of a shoe upper from the insole, means for driving said tool in a predetermined path, gaging means for determining the position of the shoe both heightwise and laterallywith respect to the path of said tool, a knife for trimming the portion of the upper which has been raised by said tool,

and a support for said knife constructed and arranged for heightwise adjustment with respect to said gage to adapt the machine for operation upon shoes having difierent thicknesses of upper material.

, 8. In an upper-trimming machine, .a tool ,for raising a iportion of the overlasted marginofia shoe upper from the "insole, meansffor driving said tool in a predetermined path, a bracket "hav to accommodate different thicknesses ofupper material.

9. In an upper-trimmingmachine, a trimming knife mounted for movement about an axis and having acutting edge of which all portions are equidistant from saidaxis, a gage-engageabie With'lihe overlasted margin of the upper ota shoe to determine the heightwise position of the shoe relatively to. the knife, a memberhaving a shoulder in the form of a straight edge about which the upper material maybe bent away from the insole, and a'support for said knife constructed and arranged for adjustment to vary the positionof the axis of the knifeover an arc;- the axis of which are is anextension of said straight edge, the'radius of the cutting edgeofj the knife being equal to the radius of said are whereby the cutting edge of the knife will passthrough the axis of the are for all positions of adjustment of the knife, and the purpose of saidv adjustment being to adapt the machine foroperation upon shoes having upper material of different thicknesses.

CLYDE KNOTTJ 

